Properties of {ital B} mesons in lattice QCD
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15620 (United States)
The results of an extensive study of {ital B}-meson properties in quenched lattice QCD are presented. The studies are carried out in the static quark limit where the {ital b} quark is taken to be infinitely massive. Our computations rely on a multistate smearing method introduced previously, with smearing functions generated from a relativistic lattice quark model. Systematic errors arising from excited state contamination, finite volume effects, and the chiral extrapolation for the light quarks are estimated. We obtain continuum results for the mass splitting {ital M}{sub {ital B}{ital s}}{minus}{ital M}{sub {ital B}{ital u}}=86{plus_minus}12(stat){sub {minus}9}{sup +7}(syst) MeV, the ratio of decay constants {ital f}{sub {ital B}{ital s}}/{ital f}{sub {ital B}{ital u}}=1.22{plus_minus}0.04(stat){plus_minus}0.02(syst). For the {ital B}-meson decay constant we separately exhibit the sizable uncertainties in the extrapolation to the continuum limit ({ital a}{r_arrow}0) and higher-order perturbative matching. We obtain {ital f}{sub {ital B}}=188{plus_minus}23(stat){plus_minus}15(syst){sub {minus}0}{sup +26}(extrap){plus_minus}14(pert) MeV.
- Research Organization:
- Univ. of California (United States)
- DOE Contract Number:
- FG03-91ER40662; AS05-89ER40518; AC02-76CH03000
- OSTI ID:
- 44775
- Journal Information:
- Physical Review, D, Vol. 51, Issue 9; Other Information: PBD: 1 May 1995
- Country of Publication:
- United States
- Language:
- English
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